Julius is the primary antagonist in Fire Emblem Genealogy of the Holy War's second generation. He is Arvis and Deirdre's son, who were intentionally brought together by Manfroy to produce their child with Loptous as his reincarnation. Additionally, he has a twin sister named Julia, half-brothers Saias and Seliph, and grandparents Victor, Cigyun, and Kurth. Furthermore, through the blood of Heim, Julius is related to Linoan, while through Fjalar's lineage, he is connected to Hilda and her children Ishtore and Ishtar.